drivers/net/usb/int51x1.c - maze/linux - Git at Google

 /*
  * Copyright (c) 2009 Peter Holik
  *
  * Intellon usb PLC (Powerline Communications) usb net driver
  *
  * http://www.tandel.be/downloads/INT51X1_Datasheet.pdf
  *
  * Based on the work of Jan 'RedBully' Seiffert
  */

 /*
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; either version 2 of the License, or.
  * (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */

 #include <linux/module.h>
 #include <linux/ctype.h>
 #include <linux/netdevice.h>
 #include <linux/etherdevice.h>
 #include <linux/ethtool.h>
 #include <linux/slab.h>
 #include <linux/mii.h>
 #include <linux/usb.h>
 #include <linux/usb/usbnet.h>

 #define INT51X1_VENDOR_ID	0x09e1
 #define INT51X1_PRODUCT_ID	0x5121

 #define INT51X1_HEADER_SIZE	2	/* 2 byte header */

 #define PACKET_TYPE_PROMISCUOUS		(1 << 0)
 #define PACKET_TYPE_ALL_MULTICAST	(1 << 1) /* no filter */
 #define PACKET_TYPE_DIRECTED		(1 << 2)
 #define PACKET_TYPE_BROADCAST		(1 << 3)
 #define PACKET_TYPE_MULTICAST		(1 << 4) /* filtered */

 #define SET_ETHERNET_PACKET_FILTER	0x43

 static int int51x1_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
 {
 	int len;

 	if (!(pskb_may_pull(skb, INT51X1_HEADER_SIZE))) {
 		netdev_err(dev->net, "unexpected tiny rx frame\n");
 		return 0;
 	}

 	len = le16_to_cpu(*(__le16 *)&skb->data[skb->len - 2]);

 	skb_trim(skb, len);

 	return 1;
 }

 static struct sk_buff *int51x1_tx_fixup(struct usbnet *dev,
 		struct sk_buff *skb, gfp_t flags)
 {
 	int pack_len = skb->len;
 	int pack_with_header_len = pack_len + INT51X1_HEADER_SIZE;
 	int headroom = skb_headroom(skb);
 	int tailroom = skb_tailroom(skb);
 	int need_tail = 0;
 	__le16 *len;

 	/* if packet and our header is smaler than 64 pad to 64 (+ ZLP) */
 	if ((pack_with_header_len) < dev->maxpacket)
 		need_tail = dev->maxpacket - pack_with_header_len + 1;
 	/*
 	 * usbnet would send a ZLP if packetlength mod urbsize == 0 for us,
 	 * but we need to know ourself, because this would add to the length
 	 * we send down to the device...
 	 */
 	else if (!(pack_with_header_len % dev->maxpacket))
 		need_tail = 1;

 	if (!skb_cloned(skb) &&
 			(headroom + tailroom >= need_tail + INT51X1_HEADER_SIZE)) {
 		if (headroom < INT51X1_HEADER_SIZE || tailroom < need_tail) {
 			skb->data = memmove(skb->head + INT51X1_HEADER_SIZE,
 					skb->data, skb->len);
 			skb_set_tail_pointer(skb, skb->len);
 		}
 	} else {
 		struct sk_buff *skb2;

 		skb2 = skb_copy_expand(skb,
 				INT51X1_HEADER_SIZE,
 				need_tail,
 				flags);
 		dev_kfree_skb_any(skb);
 		if (!skb2)
 			return NULL;
 		skb = skb2;
 	}

 	pack_len += need_tail;
 	pack_len &= 0x07ff;

 	len = (__le16 *) __skb_push(skb, INT51X1_HEADER_SIZE);
 	*len = cpu_to_le16(pack_len);

 	if(need_tail)
 		memset(__skb_put(skb, need_tail), 0, need_tail);

 	return skb;
 }

 static void int51x1_async_cmd_callback(struct urb *urb)
 {
 	struct usb_ctrlrequest *req = (struct usb_ctrlrequest *)urb->context;
 	int status = urb->status;

 	if (status < 0)
 		dev_warn(&urb->dev->dev, "async callback failed with %d\n", status);

 	kfree(req);
 	usb_free_urb(urb);
 }

 static void int51x1_set_multicast(struct net_device *netdev)
 {
 	struct usb_ctrlrequest *req;
 	int status;
 	struct urb *urb;
 	struct usbnet *dev = netdev_priv(netdev);
 	u16 filter = PACKET_TYPE_DIRECTED | PACKET_TYPE_BROADCAST;

 	if (netdev->flags & IFF_PROMISC) {
 		/* do not expect to see traffic of other PLCs */
 		filter |= PACKET_TYPE_PROMISCUOUS;
 		netdev_info(dev->net, "promiscuous mode enabled\n");
 	} else if (!netdev_mc_empty(netdev) ||
 		  (netdev->flags & IFF_ALLMULTI)) {
 		filter |= PACKET_TYPE_ALL_MULTICAST;
 		netdev_dbg(dev->net, "receive all multicast enabled\n");
 	} else {
 		/* ~PROMISCUOUS, ~MULTICAST */
 		netdev_dbg(dev->net, "receive own packets only\n");
 	}

 	urb = usb_alloc_urb(0, GFP_ATOMIC);
 	if (!urb) {
 		netdev_warn(dev->net, "Error allocating URB\n");
 		return;
 	}

 	req = kmalloc(sizeof(*req), GFP_ATOMIC);
 	if (!req) {
 		netdev_warn(dev->net, "Error allocating control msg\n");
 		goto out;
 	}

 	req->bRequestType = USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE;
 	req->bRequest = SET_ETHERNET_PACKET_FILTER;
 	req->wValue = cpu_to_le16(filter);
 	req->wIndex = 0;
 	req->wLength = 0;

 	usb_fill_control_urb(urb, dev->udev, usb_sndctrlpipe(dev->udev, 0),
 		(void *)req, NULL, 0,
 		int51x1_async_cmd_callback,
 		(void *)req);

 	status = usb_submit_urb(urb, GFP_ATOMIC);
 	if (status < 0) {
 		netdev_warn(dev->net, "Error submitting control msg, sts=%d\n",
 			    status);
 		goto out1;
 	}
 	return;
 out1:
 	kfree(req);
 out:
 	usb_free_urb(urb);
 }

 static const struct net_device_ops int51x1_netdev_ops = {
 	.ndo_open		= usbnet_open,
 	.ndo_stop		= usbnet_stop,
 	.ndo_start_xmit		= usbnet_start_xmit,
 	.ndo_tx_timeout		= usbnet_tx_timeout,
 	.ndo_change_mtu		= usbnet_change_mtu,
 	.ndo_set_mac_address	= eth_mac_addr,
 	.ndo_validate_addr	= eth_validate_addr,
 	.ndo_set_multicast_list	= int51x1_set_multicast,
 };

 static int int51x1_bind(struct usbnet *dev, struct usb_interface *intf)
 {
 	int status = usbnet_get_ethernet_addr(dev, 3);

 	if (status)
 		return status;

 	dev->net->hard_header_len += INT51X1_HEADER_SIZE;
 	dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
 	dev->net->netdev_ops = &int51x1_netdev_ops;

 	return usbnet_get_endpoints(dev, intf);
 }

 static const struct driver_info int51x1_info = {
 	.description = "Intellon usb powerline adapter",
 	.bind        = int51x1_bind,
 	.rx_fixup    = int51x1_rx_fixup,
 	.tx_fixup    = int51x1_tx_fixup,
 	.in          = 1,
 	.out         = 2,
 	.flags       = FLAG_ETHER,
 };

 static const struct usb_device_id products[] = {
 	{
 	USB_DEVICE(INT51X1_VENDOR_ID, INT51X1_PRODUCT_ID),
 		.driver_info = (unsigned long) &int51x1_info,
 	},
 	{},
 };
 MODULE_DEVICE_TABLE(usb, products);

 static struct usb_driver int51x1_driver = {
 	.name       = "int51x1",
 	.id_table   = products,
 	.probe      = usbnet_probe,
 	.disconnect = usbnet_disconnect,
 	.suspend    = usbnet_suspend,
 	.resume     = usbnet_resume,
 };

 static int __init int51x1_init(void)
 {
 	return usb_register(&int51x1_driver);
 }
 module_init(int51x1_init);

 static void __exit int51x1_exit(void)
 {
 	usb_deregister(&int51x1_driver);
 }
 module_exit(int51x1_exit);

 MODULE_AUTHOR("Peter Holik");
 MODULE_DESCRIPTION("Intellon usb powerline adapter");
 MODULE_LICENSE("GPL");
	/*
	* Copyright (c) 2009 Peter Holik
	*
	* Intellon usb PLC (Powerline Communications) usb net driver
	*
	* http://www.tandel.be/downloads/INT51X1_Datasheet.pdf
	*
	* Based on the work of Jan 'RedBully' Seiffert
	*/

	/*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation; either version 2 of the License, or.
	* (at your option) any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write to the Free Software
	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	*/

	#include <linux/module.h>
	#include <linux/ctype.h>
	#include <linux/netdevice.h>
	#include <linux/etherdevice.h>
	#include <linux/ethtool.h>
	#include <linux/slab.h>
	#include <linux/mii.h>
	#include <linux/usb.h>
	#include <linux/usb/usbnet.h>

	#define INT51X1_VENDOR_ID 0x09e1
	#define INT51X1_PRODUCT_ID 0x5121

	#define INT51X1_HEADER_SIZE 2 /* 2 byte header */

	#define PACKET_TYPE_PROMISCUOUS (1 << 0)
	#define PACKET_TYPE_ALL_MULTICAST (1 << 1) /* no filter */
	#define PACKET_TYPE_DIRECTED (1 << 2)
	#define PACKET_TYPE_BROADCAST (1 << 3)
	#define PACKET_TYPE_MULTICAST (1 << 4) /* filtered */

	#define SET_ETHERNET_PACKET_FILTER 0x43

	static int int51x1_rx_fixup(struct usbnet dev, struct sk_buff skb)
	{
	int len;

	if (!(pskb_may_pull(skb, INT51X1_HEADER_SIZE))) {
	netdev_err(dev->net, "unexpected tiny rx frame\n");
	return 0;
	}

	len = le16_to_cpu((__le16 )&skb->data[skb->len - 2]);

	skb_trim(skb, len);

	return 1;
	}

	static struct sk_buff int51x1_tx_fixup(struct usbnet dev,
	struct sk_buff *skb, gfp_t flags)
	{
	int pack_len = skb->len;
	int pack_with_header_len = pack_len + INT51X1_HEADER_SIZE;
	int headroom = skb_headroom(skb);
	int tailroom = skb_tailroom(skb);
	int need_tail = 0;
	__le16 *len;

	/* if packet and our header is smaler than 64 pad to 64 (+ ZLP) */
	if ((pack_with_header_len) < dev->maxpacket)
	need_tail = dev->maxpacket - pack_with_header_len + 1;
	/*
	* usbnet would send a ZLP if packetlength mod urbsize == 0 for us,
	* but we need to know ourself, because this would add to the length
	* we send down to the device...
	*/
	else if (!(pack_with_header_len % dev->maxpacket))
	need_tail = 1;

	if (!skb_cloned(skb) &&
	(headroom + tailroom >= need_tail + INT51X1_HEADER_SIZE)) {
	if (headroom < INT51X1_HEADER_SIZE \|\| tailroom < need_tail) {
	skb->data = memmove(skb->head + INT51X1_HEADER_SIZE,
	skb->data, skb->len);
	skb_set_tail_pointer(skb, skb->len);
	}
	} else {
	struct sk_buff *skb2;

	skb2 = skb_copy_expand(skb,
	INT51X1_HEADER_SIZE,
	need_tail,
	flags);
	dev_kfree_skb_any(skb);
	if (!skb2)
	return NULL;
	skb = skb2;
	}

	pack_len += need_tail;
	pack_len &= 0x07ff;

	len = (__le16 *) __skb_push(skb, INT51X1_HEADER_SIZE);
	*len = cpu_to_le16(pack_len);

	if(need_tail)
	memset(__skb_put(skb, need_tail), 0, need_tail);

	return skb;
	}

	static void int51x1_async_cmd_callback(struct urb *urb)
	{
	struct usb_ctrlrequest req = (struct usb_ctrlrequest )urb->context;
	int status = urb->status;

	if (status < 0)
	dev_warn(&urb->dev->dev, "async callback failed with %d\n", status);

	kfree(req);
	usb_free_urb(urb);
	}

	static void int51x1_set_multicast(struct net_device *netdev)
	{
	struct usb_ctrlrequest *req;
	int status;
	struct urb *urb;
	struct usbnet *dev = netdev_priv(netdev);
	u16 filter = PACKET_TYPE_DIRECTED \| PACKET_TYPE_BROADCAST;

	if (netdev->flags & IFF_PROMISC) {
	/* do not expect to see traffic of other PLCs */
	filter \|= PACKET_TYPE_PROMISCUOUS;
	netdev_info(dev->net, "promiscuous mode enabled\n");
	} else if (!netdev_mc_empty(netdev) \|\|
	(netdev->flags & IFF_ALLMULTI)) {
	filter \|= PACKET_TYPE_ALL_MULTICAST;
	netdev_dbg(dev->net, "receive all multicast enabled\n");
	} else {
	/* ~PROMISCUOUS, ~MULTICAST */
	netdev_dbg(dev->net, "receive own packets only\n");
	}

	urb = usb_alloc_urb(0, GFP_ATOMIC);
	if (!urb) {
	netdev_warn(dev->net, "Error allocating URB\n");
	return;
	}

	req = kmalloc(sizeof(*req), GFP_ATOMIC);
	if (!req) {
	netdev_warn(dev->net, "Error allocating control msg\n");
	goto out;
	}

	req->bRequestType = USB_DIR_OUT \| USB_TYPE_CLASS \| USB_RECIP_INTERFACE;
	req->bRequest = SET_ETHERNET_PACKET_FILTER;
	req->wValue = cpu_to_le16(filter);
	req->wIndex = 0;
	req->wLength = 0;

	usb_fill_control_urb(urb, dev->udev, usb_sndctrlpipe(dev->udev, 0),
	(void *)req, NULL, 0,
	int51x1_async_cmd_callback,
	(void *)req);

	status = usb_submit_urb(urb, GFP_ATOMIC);
	if (status < 0) {
	netdev_warn(dev->net, "Error submitting control msg, sts=%d\n",
	status);
	goto out1;
	}
	return;
	out1:
	kfree(req);
	out:
	usb_free_urb(urb);
	}

	static const struct net_device_ops int51x1_netdev_ops = {
	.ndo_open = usbnet_open,
	.ndo_stop = usbnet_stop,
	.ndo_start_xmit = usbnet_start_xmit,
	.ndo_tx_timeout = usbnet_tx_timeout,
	.ndo_change_mtu = usbnet_change_mtu,
	.ndo_set_mac_address = eth_mac_addr,
	.ndo_validate_addr = eth_validate_addr,
	.ndo_set_multicast_list = int51x1_set_multicast,
	};

	static int int51x1_bind(struct usbnet dev, struct usb_interface intf)
	{
	int status = usbnet_get_ethernet_addr(dev, 3);

	if (status)
	return status;

	dev->net->hard_header_len += INT51X1_HEADER_SIZE;
	dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
	dev->net->netdev_ops = &int51x1_netdev_ops;

	return usbnet_get_endpoints(dev, intf);
	}

	static const struct driver_info int51x1_info = {
	.description = "Intellon usb powerline adapter",
	.bind = int51x1_bind,
	.rx_fixup = int51x1_rx_fixup,
	.tx_fixup = int51x1_tx_fixup,
	.in = 1,
	.out = 2,
	.flags = FLAG_ETHER,
	};

	static const struct usb_device_id products[] = {
	{
	USB_DEVICE(INT51X1_VENDOR_ID, INT51X1_PRODUCT_ID),
	.driver_info = (unsigned long) &int51x1_info,
	},
	{},
	};
	MODULE_DEVICE_TABLE(usb, products);

	static struct usb_driver int51x1_driver = {
	.name = "int51x1",
	.id_table = products,
	.probe = usbnet_probe,
	.disconnect = usbnet_disconnect,
	.suspend = usbnet_suspend,
	.resume = usbnet_resume,
	};

	static int __init int51x1_init(void)
	{
	return usb_register(&int51x1_driver);
	}
	module_init(int51x1_init);

	static void __exit int51x1_exit(void)
	{
	usb_deregister(&int51x1_driver);
	}
	module_exit(int51x1_exit);

	MODULE_AUTHOR("Peter Holik");
	MODULE_DESCRIPTION("Intellon usb powerline adapter");
	MODULE_LICENSE("GPL");